CN211210418U - Fertilizer injection unit convenient to use - Google Patents
Fertilizer injection unit convenient to use Download PDFInfo
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- CN211210418U CN211210418U CN201922302852.7U CN201922302852U CN211210418U CN 211210418 U CN211210418 U CN 211210418U CN 201922302852 U CN201922302852 U CN 201922302852U CN 211210418 U CN211210418 U CN 211210418U
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Abstract
The utility model discloses a fertilizer injection unit convenient to use, comprising a base plate, the equal fixedly connected with in four corners of bottom plate bottom removes the wheel, the left side fixedly connected with battery at bottom plate top, the right side fixedly connected with delivery box at bottom plate top, the top fixedly connected with of delivery box stores up the fertile case. The utility model discloses a sword that digs, the discharging pipe, second electric telescopic handle, the hose, remove the wheel, the pay-off case, the second motor, a supporting plate, first electric telescopic handle, a motor, the cooperation of hob and passage is used, can be before the fertilization with soil jack-up, thereby make fertilizer can deepen fast inside soil, accelerate its speed that takes effect, it is relatively poor to have solved current fertilizer injection unit fertilization effect, at the in-process of fertiliziing, fertilizer is unrestrained on the earth's surface usually, can't deepen fast inside soil, cause fertilizer to take effect speed slow, make growth rate slower after the plant seeding, the problem of fertilization effect has been reduced.
Description
Technical Field
The utility model relates to a fertilizer injection unit technical field specifically is a fertilizer injection unit convenient to use.
Background
The physical environment of the soil firstly influences the supply of water and air of crops and also directly influences the supply and storage of nutrients, the soil is composed of particles with different sizes, the particles form three phases of a soil body, namely a solid phase, a liquid phase and a gas phase, the soil is generally fertile, the solid phase of the soil occupies more than half of the volume of the whole soil, and the soil is filled with water and air, soil pores not only bear the supply of the water and the air of the crops but also play an important role in the growth of the crops, but also directly influence the diffusion of the nutrients in the soil, soil clay grains, soil organic matters and soil acidity are important factors influencing the chemical environment of the soil, the soil nutrients play an important role in the growth of the crops even under the condition of fertilization, and when the soil can not provide the nutrients required by the growth and development of the crops, the action of artificially supplementing nutrient elements to the crops is called as fertilization, before crops are sown, fertilization is usually required.
The current fertilizer injection unit fertilization effect is relatively poor, and at the in-process of fertilizing, fertilizer is unrestrained on the earth's surface usually, can't deepen soil fast inside, causes fertilizer to take effect speed slow, makes the plant seeding after growth rate slower, has reduced the effect of fertilizeing.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a fertilizer injection unit convenient to use possesses the effectual advantage of fertilization, and it is relatively poor to have solved current fertilizer injection unit fertilization effect, and at the in-process of fertilizeing, fertilizer is unrestrained on the earth's surface usually, can't go deep into soil fast inside, causes fertilizer to become effect speed slow, makes the growth rate after the plant seeding slower, has reduced the problem of fertilization effect.
In order to achieve the above object, the utility model provides a following technical scheme: a fertilizer application device convenient to use comprises a bottom plate, wherein four corners of the bottom plate are fixedly connected with movable wheels, the left side of the top of the bottom plate is fixedly connected with a storage battery, the right side of the top of the bottom plate is fixedly connected with a feeding box, the top of the feeding box is fixedly connected with a fertilizer storage box, the top of the left side of the fertilizer storage box is fixedly connected with a supporting plate, the front side and the rear side of the left side of the bottom of the supporting plate are fixedly connected with first electric telescopic rods, the bottom of each first electric telescopic rod penetrates through the bottom of the bottom plate and is fixedly connected with a movable plate, the front side and the rear side of the bottom of the movable plate are fixedly connected with first connecting plates, the bottom of the back surface of the first connecting plate at the rear side is fixedly connected with a first motor, the front side of the output end of the first motor penetrates through, the soil turning cutter is fixedly sleeved on the surface of the rotating rod, a second motor is fixedly connected to the left side of the feeding box, the right side of the output end of the second motor penetrates through the inner cavity of the feeding box and is fixedly connected with a spiral rod, the right side of the spiral rod is movably connected to the right side of the inner cavity of the feeding box, a material guiding pipe is communicated with the right side of the bottom of the feeding box, the bottom of the material guiding pipe penetrates through the bottom of the bottom plate and is communicated with a hose, one end, away from the material guiding pipe, of the hose is communicated with a material discharging pipe, a second electric telescopic rod is fixedly connected to the bottom of the bottom plate and is positioned right above the material discharging pipe, a second connecting plate is fixedly connected to the bottom of the bottom back surface of the second connecting plate and is movably connected to the left side of the front surface of the material discharging pipe through a rotating shaft, a fertilizer feeding pipe is communicated with the center, the bottom of the material guide pipe is communicated with the left side of the top of the feeding box.
Preferably, the four corners of the bottom plate are fixedly connected with fixing columns, the bottoms of the fixing columns are fixedly connected with the tops of the moving wheels, and the moving wheels are universal wheels.
Preferably, the left side fixedly connected with battery box at bottom plate top, battery fixed connection is in the bottom of battery box inner chamber, the left side at battery box top has the apron through pivot swing joint.
Preferably, the top of the first motor is fixedly connected with a mounting plate, the front side of the mounting plate is fixedly connected with the back surface of the first rear connecting plate, the rotating rod is movably connected with the back surface of the first front connecting plate through a first bearing, the output end of the second motor is movably connected with the left side of the feeding box through a second bearing, and the right side of the screw rod is movably connected with the right side of the inner cavity of the feeding box through a third bearing.
Preferably, a mudguard is fixedly connected to the top of the right side of the first connecting plate, a rubber soft plate is fixedly connected to one end, far away from the first connecting plate, of the mudguard, and the horizontal height of the bottom of the rubber soft plate is lower than that of the bottom of the soil turning knife.
Preferably, the equal fixedly connected with dead lever in both sides around the bottom plate top right side, the top fixedly connected with handle on dead lever right side, the fixed cover in surface of handle is equipped with the antiskid cover, the inner chamber fixed mounting of passage has the solenoid valve, the right side fixedly connected with guide plate of storage fertilizer box inner chamber bottom.
Preferably, the positive fixed surface of fertilizer storage box is connected with the controller, and the output of controller passes through the one-way electric connection of wire with the input of first motor, second motor, first electric telescopic handle, second electric telescopic handle and solenoid valve respectively, the one-way electric connection of wire is passed through to the output of battery and the input of controller.
Compared with the prior art, the beneficial effects of the utility model are as follows:
1. the utility model discloses a sword that digs, the discharging pipe, second electric telescopic handle, the hose, remove the wheel, the pay-off case, the second motor, a supporting plate, first electric telescopic handle, a motor, the cooperation of hob and passage is used, can be before the fertilization with soil jack-up, thereby make fertilizer can deepen fast inside soil, accelerate its onset speed, can evenly scatter fertilizer simultaneously, it is relatively poor to have solved current fertilizer injection unit fertilization effect, at the in-process of fertiliziing, fertilizer is unrestrained on the earth's surface usually, can't deepen fast inside soil, cause fertilizer to become effect speed slow, it is slower to make growth rate after the plant seeding, the problem of fertilization effect has been reduced.
2. The utility model can conveniently promote fertilization by using the moving wheel, can fix the storage battery by using the battery box, can protect the storage battery, can shield the storage battery by using the cover plate, can avoid the storage battery from being wetted by rainwater, can shield earth by using the mudguard and the rubber soft plate when turning earth, and can avoid the phenomenon of splashing of the earth, and can adjust the height of the turning earth knife by using the first electric telescopic rod, thereby adjusting the turning depth, and can adjust the height of the discharging pipe by using the second electric telescopic rod, thereby adjusting the fertilizer outlet height, and can conveniently adjust the angle of the discharging pipe by using the rotating shaft, thereby adjusting the discharging angle, and can conveniently promote the fertilizing device by using the handle, and can uniformly flow the fertilizer out to the material guiding pipe by using the screw rod, through the use of guide plate, can conveniently be with fertilizer water conservancy diversion to passage mouth of a pipe department.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a left view structural diagram of the utility model;
figure 3 is the cross-sectional structure view of the feeding box of the utility model.
In the figure: the device comprises a base plate 1, a fixed column 2, a soil turning knife 3, a moving plate 4, a rotating rod 5, a first connecting plate 6, a rubber soft plate 7, a fender 8, a discharging pipe 9, a second connecting plate 10, a second electric telescopic rod 11, a hose 12, a moving wheel 13, a material guiding pipe 14, a feeding box 15, a fixed rod 16, a handle 17, a fertilizer feeding pipe 18, a fertilizer storage box 19, a second motor 20, a supporting plate 21, a first electric telescopic rod 22, a storage battery 23, a battery box 24, a first motor 25, a screw rod 26 and a material guiding pipe 27.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to be referred must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "connected", and the like are to be construed broadly, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model discloses a bottom plate 1, fixed column 2, the sword 3 that digs, movable plate 4, bull stick 5, first connecting plate 6, rubber soft board 7, fender 8, discharging pipe 9, second connecting plate 10, second electric telescopic handle 11, hose 12, remove wheel 13, draw material pipe 14, feeding box 15, dead lever 16, handle 17, fertilizer advances pipe 18, storage fertilizer box 19, second motor 20, backup pad 21, first electric telescopic handle 22, battery 23, battery box 24, first motor 25, hob 26 and passage 27 part are the parts that general standard spare or technical personnel in the field know, its structure and principle all can learn through the technical manual or learn through conventional experimental method for this technical personnel.
Referring to fig. 1-3, a fertilizer applying device convenient to use comprises a bottom plate 1, moving wheels 13 are fixedly connected to four corners of the bottom plate 1, fixed columns 2 are fixedly connected to four corners of the bottom plate 1, the bottoms of the fixed columns 2 are fixedly connected to the top of the moving wheels 13, the moving wheels 13 are universal wheels, through the use of the moving wheels 13, fertilizer application can be conveniently pushed, a storage battery 23 is fixedly connected to the left side of the top of the bottom plate 1, a battery box 24 is fixedly connected to the left side of the top of the bottom plate 1, the storage battery 23 is fixedly connected to the bottom of an inner cavity of the battery box 24, a cover plate is movably connected to the left side of the top of the battery box 24 through a rotating shaft, through the use of the battery box 24, the storage battery 23 can be fixed and can be protected, through the use of the cover plate, the storage battery 23 can be shielded, the top of the feeding box 15 is fixedly connected with a fertilizer storage box 19, the top of the left side of the fertilizer storage box 19 is fixedly connected with a supporting plate 21, the front side and the rear side of the left side of the bottom of the supporting plate 21 are fixedly connected with first electric telescopic rods 22, the height of the soil turning cutter 3 can be adjusted through the use of the first electric telescopic rods 22, so as to adjust the soil turning depth, the bottom of each first electric telescopic rod 22 penetrates through the bottom of the bottom plate 1 and is fixedly connected with a movable plate 4, the bottom of the bottom plate 1 is provided with a moving hole matched with the movable plate 4 for use, the front side and the rear side of the bottom of the movable plate 4 are fixedly connected with first connecting plates 6, the bottom of the back surface of the first connecting plate 6 at the back side is fixedly connected with a first motor 25, the front side of the output end of the first motor 25 penetrates between the opposite sides of the first, the surface of the rotating rod 5 is fixedly sleeved with a soil turning cutter 3, the top of the right side of the first connecting plate 6 is fixedly connected with a mudguard 8, one end of the mudguard 8, which is far away from the first connecting plate 6, is fixedly connected with a rubber soft plate 7, the horizontal height of the bottom of the rubber soft plate 7 is lower than that of the bottom of the soil turning cutter 3, through the use of the mudguard 8 and the rubber soft plate 7, soil can be sheltered during soil turning, the phenomenon of soil splashing is avoided, the left side of the feeding box 15 is fixedly connected with a second motor 20, the right side of the output end of the second motor 20 penetrates through the inner cavity of the feeding box 15 and is fixedly connected with a spiral rod 26, the top of the first motor 25 is fixedly connected with a mounting plate, the front side of the mounting plate is fixedly connected with the back surface of the rear first connecting plate 6, the rotating rod 5 is movably connected with the back surface of the front first connecting plate 6 through a bearing, the output, the right side of the screw rod 26 is movably connected with the right side of the inner cavity of the feeding box 15 through three bearings, the right side of the screw rod 26 is movably connected with the right side of the inner cavity of the feeding box 15, the right side of the bottom of the feeding box 15 is communicated with a material guiding pipe 14, the bottom of the material guiding pipe 14 penetrates through to the bottom of the bottom plate 1 and is communicated with a hose 12, one end, far away from the material guiding pipe 14, of the hose 12 is communicated with a discharging pipe 9, a second electric telescopic rod 11 is fixedly connected to the bottom of the bottom plate 1 and is positioned right above the discharging pipe 9, the height of the discharging pipe 9 can be adjusted through the use of the second electric telescopic rod 11, so that the fertilizer discharging height can be adjusted, a second connecting plate 10 is fixedly connected to the bottom of the back surface of the second connecting plate 10 and the left side of the front surface of the discharging pipe 9, and the angle of, thereby adjust ejection of compact angle, the center department at storage fertilizer case 19 top communicates has fertilizer to advance pipe 18, the left side intercommunication of storage fertilizer case 19 bottom has passage 27, the bottom of passage 27 communicates in the left side at pay-off box 15 top, the equal fixedly connected with dead lever 16 in both sides around bottom plate 1 top right side, the top fixedly connected with handle 17 on dead lever 16 right side, the fixed cover in surface of handle 17 is equipped with anti-skidding cover, the inner chamber fixed mounting of passage 27 has the solenoid valve, the right side fixedly connected with guide plate of storage fertilizer case 19 inner chamber bottom, through the use of handle 17, can conveniently promote fertilizer injection unit, through the use of hob 26, can make fertilizer flow out to guide pipe 14 evenly, through the use of guide plate, can conveniently lead fertilizer to 27 mouth of pipe departments, the positive fixed surface of storage fertilizer case 19 is connected with the controller, the output of controller respectively with first motor 25, The input ends of the second motor 20, the first electric telescopic rod 22, the second electric telescopic rod 11 and the electromagnetic valve are in one-way electric connection through a lead, the output end of the storage battery 23 is in one-way electric connection with the input end of the controller through a lead, and the soil turning knife 3, the discharging pipe 9, the second electric telescopic rod 11, the hose 12, the moving wheel 13, the feeding box 15, the second motor 20, the supporting plate 21, the first electric telescopic rod 22, the first motor 25, the spiral rod 26 and the material guiding pipe 27 are matched for use, so that the soil can be turned up before fertilization, the fertilizer can quickly enter the soil to accelerate the onset speed, and the fertilizer can be uniformly spread, thereby solving the problems that the prior fertilizing device has poor fertilizing effect, the fertilizer usually falls on the ground surface and cannot quickly enter the soil, the fertilizer onset speed is too slow, and the growth speed of the plants after sowing is slow, the problem of fertilizer application effect is reduced.
When the fertilizer feeding device is used, fertilizer is put into the fertilizer storage box 19 through the fertilizer feeding pipe 18 and is guided to the pipe orifice of the material guide pipe 27 through the guide plate, the first electric telescopic rod 22 is opened through the controller to extend, so that the soil turning cutter 3 is driven to move downwards, the soil turning cutter 3 is contacted with soil to different depths, so that the soil turning depth is adjusted, the angle of the material discharging pipe 9 is adjusted through the rotating shaft, the material discharging angle is controlled, then the second electric telescopic rod 11 is opened through the controller to stretch and retract, so that the upper position and the lower position of the material discharging pipe 9 are adjusted, the effect of adjusting the material discharging height is achieved, then the first motor 25, the second motor 20 and the electromagnetic valve are respectively opened through the controller, the fertilizer enters the material feeding box 15 through the material guide pipe 27, the output end of the first motor 25 drives the spiral rod 26 to rotate, the fertilizer falling from the material guide pipe 27 is uniformly conveyed to the material guide pipe 14, and then falls into, the fertilizer application effect is achieved.
In summary, the following steps: this fertilizer injection unit convenient to use, through the sword 3 that digs, discharging pipe 9, second electric telescopic handle 11, hose 12, remove wheel 13, pay-off box 15, second motor 20, backup pad 21, first electric telescopic handle 22, first motor 25, the cooperation of hob 26 and passage 27 is used, it is relatively poor to have solved current fertilizer injection unit fertilization effect, at the in-process that fertilizies, fertilizer is unrestrained on the earth's surface usually, can't deepen soil fast inside, it is too slow to cause fertilizer to become effect speed, make the plant sow after growth speed slower, the problem of fertilization effect has been reduced.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A fertilizer injection unit convenient to use, includes bottom plate (1), its characterized in that: the all fixedly connected with in four corners of bottom plate (1) bottom removes wheel (13), left side fixedly connected with battery (23) at bottom plate (1) top, right side fixedly connected with pay-off case (15) at bottom plate (1) top, the top fixedly connected with of pay-off case (15) stores up fertile case (19), store up the left top fixedly connected with backup pad (21) of fertile case (19), the equal fixedly connected with first electric telescopic handle (22) in both sides around backup pad (21) bottom is left, the bottom of first electric telescopic handle (22) runs through to the bottom and fixedly connected with movable plate (4) of bottom plate (1), the equal fixedly connected with first connecting plate (6) in both sides around movable plate (4) bottom, the bottom fixedly connected with first motor (25) of the first connecting plate (6) of rear side, the front side of first motor (25) output runs through to between the relative one side of first connecting plate (6) and fixedly connected with back surface A rotating rod (5) is connected, the front side of the rotating rod (5) is movably connected to the back surface of a front side first connecting plate (6), a soil turning cutter (3) is fixedly sleeved on the surface of the rotating rod (5), a second motor (20) is fixedly connected to the left side of the feeding box (15), the right side of the output end of the second motor (20) penetrates through the inner cavity of the feeding box (15) and is fixedly connected with a spiral rod (26), the right side of the spiral rod (26) is movably connected to the right side of the inner cavity of the feeding box (15), a material guiding pipe (14) is communicated with the right side of the bottom of the feeding box (15), the bottom of the material guiding pipe (14) penetrates through the bottom of the bottom plate (1) and is communicated with a hose (12), one end, far away from the material guiding pipe (14), of the hose (12) is communicated with a material discharging pipe (9), the bottom of the bottom plate (1) is positioned right above the material discharging pipe (9, the bottom fixedly connected with second connecting plate (10) of second electric telescopic handle (11), through pivot swing joint between the bottom on the back of the body surface of second connecting plate (10) and the left side on discharging pipe (9) positive surface, the center department intercommunication at storage fertilizer case (19) top has fertilizer to advance pipe (18), the left side intercommunication of storage fertilizer case (19) bottom has passage (27), the bottom of passage (27) communicates in the left side at pay-off case (15) top.
2. The fertilizer applicator as claimed in claim 1, wherein: the all fixedly connected with fixed column (2) in four corners of bottom plate (1) bottom, the bottom of fixed column (2) and the top fixed connection who removes wheel (13), remove wheel (13) and be the universal wheel.
3. The fertilizer applicator as claimed in claim 1, wherein: the battery box is characterized in that a battery box (24) is fixedly connected to the left side of the top of the bottom plate (1), a storage battery (23) is fixedly connected to the bottom of an inner cavity of the battery box (24), and a cover plate is movably connected to the left side of the top of the battery box (24) through a rotating shaft.
4. The fertilizer applicator as claimed in claim 1, wherein: the top fixedly connected with mounting panel of first motor (25), and the front side fixed connection of mounting panel is in the back of the body surface of the first connecting plate of rear side (6), through bearing one swing joint between the back of the body surface of bull stick (5) and the first connecting plate of front side (6), through bearing two swing joint between the left side of second motor (20) output and pay-off case (15), through bearing three swing joint between the right side of hob (26) and the right side of pay-off case (15) inner chamber.
5. The fertilizer applicator as claimed in claim 1, wherein: the soil turning device is characterized in that a fender (8) is fixedly connected to the top of the right side of the first connecting plate (6), one end, far away from the first connecting plate (6), of the fender (8) is fixedly connected with a rubber soft plate (7), and the horizontal height of the bottom of the rubber soft plate (7) is lower than that of the bottom of the soil turning knife (3).
6. The fertilizer applicator as claimed in claim 1, wherein: the equal fixedly connected with dead lever (16) in both sides around bottom plate (1) top right side, top fixedly connected with handle (17) on dead lever (16) right side, the fixed cover in surface of handle (17) is equipped with the antiskid cover, the inner chamber fixed mounting of passage (27) has the solenoid valve, the right side fixedly connected with guide plate of storage fertilizer case (19) inner chamber bottom.
7. The fertilizer applicator as claimed in claim 6, wherein: the positive fixed surface of fertilizer storage box (19) is connected with the controller, and the output of controller passes through the one-way electric connection of wire with the input of first motor (25), second motor (20), first electric telescopic handle (22), second electric telescopic handle (11) and solenoid valve respectively, the one-way electric connection of wire is passed through with the input of controller to the output of battery (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922302852.7U CN211210418U (en) | 2019-12-19 | 2019-12-19 | Fertilizer injection unit convenient to use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922302852.7U CN211210418U (en) | 2019-12-19 | 2019-12-19 | Fertilizer injection unit convenient to use |
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| Publication Number | Publication Date |
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| CN211210418U true CN211210418U (en) | 2020-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922302852.7U Active CN211210418U (en) | 2019-12-19 | 2019-12-19 | Fertilizer injection unit convenient to use |
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| CN (1) | CN211210418U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112586114A (en) * | 2020-11-05 | 2021-04-02 | 大团结农业股份有限公司 | Nursery stock is planted and is used soil fertilizer injection unit |
| CN112956316A (en) * | 2021-02-01 | 2021-06-15 | 安徽鹏翔生态农业集团有限公司 | Method for planting sugar yellow peaches by using slow release fertilizer |
| CN112970370A (en) * | 2021-02-19 | 2021-06-18 | 上海市政工程设计研究总院（集团）有限公司 | Fertilizing device and fertilizing method for saline-alkali soil |
-
2019
- 2019-12-19 CN CN201922302852.7U patent/CN211210418U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112586114A (en) * | 2020-11-05 | 2021-04-02 | 大团结农业股份有限公司 | Nursery stock is planted and is used soil fertilizer injection unit |
| CN112956316A (en) * | 2021-02-01 | 2021-06-15 | 安徽鹏翔生态农业集团有限公司 | Method for planting sugar yellow peaches by using slow release fertilizer |
| CN112970370A (en) * | 2021-02-19 | 2021-06-18 | 上海市政工程设计研究总院（集团）有限公司 | Fertilizing device and fertilizing method for saline-alkali soil |
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